Inregistrati-va pentru a beneficia de cunostintele comunitatii, a pune intrebari sau a a raspunde la intrebarilor celorlalti.
Suntem o comunitate care incurajeaza educatia si in care se intalnesc know-how-ul si experienta cu perspective inovative de abordare a problemelor.
Autentificati-va pentru a pune intrebari, a raspunde la intrebarilor celorlalti sau pentru a va conecta cu prietenii.
V-ati uitat parola ? Introduceti adresa de email si veti primi o noua parola.
Please briefly explain why you feel this question should be reported.
Va rugam explicate, pe scurt, de ce credeti ca aceasta intrebare trebuie raportata.
Motivul pentru care raportezi utilizatorul.
Construiti un triunghi ABC stiind ca AB=3 cm , BC=5 cm si lungimea medianei corespunzatoare laturii [AC] este BM = 4,5 cm
Deci am incercat in toate feurile pur si simplu nu-mi iese
*** QuickLaTeX cannot compile formula: \[\begin{array}{l} \underline {{\rm{Pro}}} {\rm{p}}\underline {{\rm{rietatea medianei}}} \\ B{M^2} = \frac{{2(A{B^2} + B{C^2}) - A{C^2}}}{4} \Rightarrow {\left( {4,5} \right)^2} = \frac{{2({3^2} + {5^2}) - A{C^2}}}{4} \Rightarrow 20,25 = \frac{{68 - A{C^2}}}{4} = \frac{{68}}{4} - \frac{{A{C^2}}}{4} \\ \Rightarrow 20,25 = 17 - \frac{{A{C^2}}}{4} \Rightarrow \frac{{A{C^2}}}{4} = 17 - 20,25 = - 3,25 \Rightarrow A{C^2} = 4*( - 3,25) = - 13 \Rightarrow AC = \sqrt { - 13} \\ \Rightarrow contradictie\underbrace {\left| {AC} \right|}_{{\rm{modul}}} = \sqrt { - 13} \\ sau \\ B{M^2} = \frac{{2(A{B^2} + B{C^2}) - A{C^2}}}{4} \Rightarrow B{M^2} = \frac{{2({3^2} + {5^2}) - {{(2x)}^2}}}{4} = \frac{{68 - 4{x^2}}}{4} = \frac{{4(17 - {x^2})}}{4} = 17 - {x^2} \\ \Rightarrow B{M^2} = 17 - {x^2} \Rightarrow B{M^2} + {x^2} = 17 \Rightarrow {\left( {4,5} \right)^2} + {x^2} = 17 \Rightarrow 20,25 + {x^2} = 17 \Rightarrow \underbrace {x = nr.{\rm{ }}negativ}_{contradictie} \\ {\rm{Din suma de doua patrate perfecte ] *** Error message: \begin{array} on input line 9 ended by \end{document}. leading text: \end{document} Improper \prevdepth. leading text: \end{document} Missing $ inserted. leading text: \end{document} Missing } inserted. leading text: \end{document} Missing } inserted. leading text: \end{document} Missing } inserted. leading text: \end{document} Missing \cr inserted. leading text: \end{document} Missing $ inserted. leading text: \end{document} You can't use `\end' in internal vertical mode. leading text: \end{document} \begin{array} on input line 9 ended by \end{document}. leading text: \end{document} Missing } inserted. leading text: \end{document} Emergency stop.